Radio receiving device



Oct. 8, 1929. G. L. BEE-RS 1,730,874

RADIO RECEIVING DEVICE Filed Feb. 10, 1925 WITNESSES: INVENTOR 7 VGeorge 1. 588/15.

TORNEY Patented Oct. 8, 1929 UNITED STATES- PATENT OFFICE GEORGE L.BEER-S, OF WILKINSBUBG, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC& MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA RADIO RECEIVINGDEVICE Application filed February My invention relates to radioreceiving devices and: particularly to radio receiving devices of thetype comprising a loop antenna.

An object of my invention is to provide an improved radio-receivingdevice comprising a loop-antenna and a cabinet, the cabinet being soconstructed as to permit storage therein of the loop-antenna when thedevice is not in operation.

Another object of my invention is to produce a convenient, demountableloop-antenna.

Another object of my invention is to produce a rotatable loop antennawhich may be easily demounted from its support.

Another objcctof my invention is to provide, in a radio-receiving systemof the type comprising a rotatable and demountablc loop-antenna, meanswhereby the use of flexible conductors, between the loop-antenna and theadditional apparatus, shall be avoided. I

In the construction and operation of radio receiving sets, it has beencustomary to combine certain systems of radio receiving apparatus withloop antennze. This combination has usually been made by placing theloop and the receiving apparatusupon a convenient table and making aconnection between the loop and the additional electrical units bymeansof flexible wire leads. This combination has been bulky and clumsy. Onlyunder special conditions has the loop been conveniently rotatable tochange the plane of reception from station to station, and while theloop structure has occasionally been constructed to be folded into apresumably more compact structure, convenient storage means have beenlacking.

According to my invention, I so supportthe electrical units,constituting a radio receiver, from the inner surface ofone of the wallsof a radio-cabinet, that sufficient space exists between the said unitsand the other walls of the cabinet to accommodate a loopantenna when thereceiver is not in use. In addition, I provide a device for rotatablysupporting the loop exteriorly of the cabinet when the receiver is inuse, the said supporting device being so constructed and 10, 1925.Serial No. 8,210.

mounted that it is capable of being retracted into the cabinet: when notin service.

Other objectsand structural details of my nvention will be apparent fromthe followmg description, when read in connection with the accompanyingdrawings, wherein:

- Figure 1 is a view in front elevation of an embodiment of myinvention, and

Figure 2 is a fragmentary View in vertical section of the sameembodiment, substantially on the line 2-2 of Fig. 1.

In the drawing, a cabinet 1 has attached to the front thereof, a panel 2upon which are mounted the proper dialsandcontrol devices as indicated.The rear portion of the cabinet is provided with hinged door portions 3and 1 adapted to be swung open and to permit access to the interior ofthe case. The customary triode vacuum tubes 5 and associated coilsandtransformerapparatus 6 aremounte'd upon a base plate 7 supported fromthe panel 1 by a bracket 8, thereby leaving a clear unencumbered spacearound the entire periphery of the apparatusand within the margin of thecabinet. A loop antenna: 9 is constructed of a size suitable forinsertion within this space.

The loop 9 is constructed with a journal bearing 11 at the approximatecenter of its lower cross member and is provided with a wire winding 10.pivot shaft 12, adapted to cooperate -with journal 11, is slidablymounted within the case 1 and is arranged to be projected upwardlythrough the top thereof. The shaft 12 is adapted to be held in eitherprojected or withdrawn position by a locking device comprising aset-screw 1 1. A plurality of contact sleeves 15, 16 and 17 are providedupon the upper end of the shaft 12 to'which connection is made by leads18 that are also connected to the amplifying and detecting apparatus 5and 6. The loop 9 is provided with a brush holder 19 upon which aremounted brushes 20, 21 and 22 from which connection is made to variousportions of the wire 10 wound upon loop frame 9;

In the operation of my device, the loop may be inserted within thecase 1in the course of preparation for shipment thereof. It remains in thisposition during such periods of storage and non-use as may be desirable,and

it is adapted to so fit with sufi'icient closeness that there is littleshaking or danger of breakage during shipment. lVhen it is de sired tooperate the apparatus, the panel portions 3 and 4 of the case 1 areopened and swung back, whereupon the loop 9 is conveniently accessibleand may readily be withdrawn from its storage position. With the loopwithdrawn, the setscrew 14 and the shaft 12 become convenientlyaccessible and the shaft 12 may be pushed upward into operative positionand held there by the setscrew 14. The panels 3 and 4 of case 1 may thenbe closed to restore protection from dust and injury to the containedradio apparatus.

The bearing 11 of loop 9 may then be fitted over the shaft 12 andallowed to slide down until stopped by the surface of the top of thecase 1, in which position register is obtained between the brushes 20,21 and 22 and the contact thimbles 15, 16 and 17. Upon energization ofthe triodes 5 within the apparatus, such signals as are beingtransmitted with sufficient strength may be received upon the apparatus,and undesired stations maybe excluded by suitable tuning of theapparatus and by suitable rotation of the loop 9.

Upon the completion of the reception of the desired signals, the loop 9may be returned to its storage place by a reversal of the sequence ofthe operations described for the preparation of the apparatus foroperation.

Although I have illustrated and described only a single embodiment of myinvention many modifications thereof will be apparent to those skilledin the art to which it pertains. My invention, therefore, is not to belimited except in so far as is necessitated by the prior art or by thespirit of the appended claims.

I claim as my invention:

1. In a radio receiving system, a loop antenna, a cabinet, a receivingset within said or binet and supported wholly from one wall thereof andclosable openings inthe opposite wall of said cabinet through which saidloop may be passed, the receiving set being spaced away from theremaining walls of the cabinet sufiiciently to permit the loop antennato be inserted into the cabinet in a position surrounding the receivingset.

2. In a radio receiving system, a loop antenna, a cabinet, a receivingset within said cabinet and supported wholly from one wall thereof, theopposite. wall of the cabinet having openings, closures for saidopenings, the size of the openings being suiiicient to permit thepassage of the loop antenna when theolosures are open, the receiving setbeing spaced away from the remaining walls of the cabinet sufiicientlyto permit the loop antenna to be inserted into the cabinet in a positionsurrounding the receiving set.

3, In a radio receiving system, a loop an- "tenna, a cabinet, receivingapparatus within said cabinet and supported wholly from one wallthereof, the opposite wall of the cabinet having openings provided withmovable closures, the size of the openings being suiiicient to permitthe passage of the loop antenna when the closures are open, thereceiving set being spaced away from the interior of the cabinetsufficiently to permit the loop antenna to be inserted into the cabinetin a position surrounding the receiving apparatus, and anantenna-supporting device mounted in the interior of said cabinet andbeing adapted to be partially withdrawn therefrom.

4. A radio receiving system comprising a cabinet having a front wall,receiving apparatus within said cabinet supported wholly from said walland spaced away from the remaining walls, a loop antenna, said cabinetbeing provided with movable closures of suiiicient size to permit saidloop to be inserted into said cabinet in a position surrounding saidreceiving apparatus or withdrawn therefrom, and separable means formounting said loop exteriorly on said cabinet.

5. A radio receiving system comprising a cabinet having a front wall,receiving apparatus within said cabinet supported wholly from said walland spaced away from the remaining walls, a loop antenna, said cabinetbeing provided with movable closures of sufiicient size to permit saidloop to be inserted into said cabinet in a position entirely surroundingsaid receiving apparatus or withdrawn therefrom, and separable means forrotatably mounting said loop extericrly on said cabinet, said meanscomprising devices for electrically connecting said loop to sairreceiving apparatus.

6. A radio receiving system comprising a cabinet having a front wall,receiving apparatus within said cabinet supported wholly from said walland spaced away from the remaining walls, a loop antenna, said cabinetbeing provided with movable closures of sufficient size to permit saidloop to be inserted into said cabinet in position surrounding saidreceiving apparatus or withdrawn therefrom, and a loop-supporting deviceslidably mounted in said cabinet and adapted to be withdrawn partiallytherefrom, said supporting device and said loop being provided withseparable cooperative elements for connecting said loop electrically tosaid receiving apparatus.

In testimony whereof, I have hereunto subscribed my name this 3rd day ofFebruary, 1925.

GEORGE L. BEERS.

